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Path: utzoo!hoptoad!amdcad!apple!rutgers!labrea!teknowledge-vaxc!uw-beaver!uw-june!uw-entropy!dataio!pilchuck!ssc!markz
From: markz@ssc.UUCP (Mark Zenier)
Newsgroups: comp.windows.misc,comp.sys.mac,alt.cyberpunk
Subject: Re: replacing the desktop metaphor
Keywords: desktop metaphor, graphical interfaces, computing environments
Message-ID: <1618@ssc.UUCP>
Date: 5 Jan 89 21:00:21 GMT
References: <454@blake.acs.washington.edu> <17939@glacier.STANFORD.EDU> <3637@ttidca.TTI.COM>
Organization: SSC, Inc., Seattle, WA
Lines: 29

In article <3637@ttidca.TTI.COM>, hollombe@ttidca.TTI.COM (The Polymath) writes:
> In article <1611@ssc.UUCP> markz@ssc.UUCP (Mark Zenier) writes:
> }What resolution (pixels per inch or meter) and contrast (bits, levels, ratio)
> }are needed to form a decent hologram.
> Pixels would have to be separated by no more than half the wavelength of
> the light used, a distance commonly measured in Angstroms.  That's well
> beyond the ability of current technology to create, let alone drive.

5000 angstroms = 500 nanometers = .5 micrometer = bluegreen
Another generation or two of advances in microlithography and you're there.
Why do you think they keep talking about using X-Rays to make the next 
generation of memory chips.

I don't think that Liquid Crystals will work but something else might.

> You're talking about millions of pixels _per inch_.  

10.E9 per square inch at 1/2 wave spacing.

> The processing capacity to
> drive such a display would be mind boggling, even by today's standards.

Got to do something to soak up the CPU cycles so that the A.I. people don't
have them around to play with :-).


Mark Zenier    uunet!nwnexus!pilchuck!ssc!markz    markz@ssc.uucp
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